摘要
分布式水文模型能充分考虑下垫面条件的不均匀性及空间尺度相耦合性,已成为目前流域水文模型研究的热点。基于栅格的流域分布式水文模型是常建的模型,其核心问题是栅格产流计算和汇流计算,关键技术问题之一是如何解决栅格的汇流次序。马斯京根法是分布式水文模型汇流中常用的方法之一,在计算中需要用到上游栅格本计算时段的出流,这就需要确保在计算某一栅格出流前,其所有入流栅格都已经计算过出流。该文在栅格汇流流路分析的基础上,通过栅格汇流累积矩阵建立栅格汇流入流栅格累计数统计数据,较简单地解决了这一问题,并应用于实验流域,效果较满意。
Distributed hydrologic models in watershed have become the hot spot in the current research of hydrologic modeling because it can take into account the asymmetry and the spatial scale coupling of the underlying surface. The usual model is the grid-based distributed hydrologic model, the key question is the calculation of runoff and confluence in which how to calculate the confluence order is the main problem. Muskingum model is one of the common methods applied to the distributed hydrologic model. During the process, the outflow of upstream in current calculation interval is required. This means that it is necessary to make sure that before the computing the outflow of one certain grid, the outflow of all the grids that flow into that grid should be counted. Based on the analysis of the way of confluence, we solve this problem in an easier way： we got the statistic data about the accumulation of all the grids that flow into certain grid using the accumulation matrix of confluence. This is applied to the Jinjia Watershed in Anhui, and the result is satisfying.
出处
《水科学与工程技术》
2009年第3期1-3,共3页
Water Sciences and Engineering Technology
基金
国家自然科学基金资助(40571024J0630535)
国家"973"基础研究计划(2006CB403208)
关键词
分布式水文模型
马斯京根法
栅格汇流次序
栅格累积矩阵
distributed hydrologic model
Muskingum model
the confluence order of grids
the accumulation matrix of grid confluence
